2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 270

(b) Turn the engine switch on (IG).

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Text in Illustration

NG -- CHECK NO. 2 FLOOR WIRE (SHORT TO B+)

OK -- Continue to next step.

6. CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT (SHORT TO GROUND)

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Measure the resistance according to the value(s) in the table below.

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 714

(b) Turn the engine switch on (IG).

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Text in Illustration

NG -- CHECK FRONT DOOR WIRE RH (SHORT TO B+)

OK -- Continue to next step.

40. CHECK WIRE HARNESS (SHORT TO GROUND)

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Measure the resistance according to the value(s) in the table below.

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 505

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Allow exhaust gas (NOx) to travel to the sensing portion of the smog ventilation sensor.

(e) Enter the following menus: Body Electrical / Air Conditioner / Data List.

(f) Check the value(s) by referring to the table below.

Air Conditioner

OK:

The display is as specified in the Normal Condition column.

Result:

C -- REPLACE A/C AMPLIFIER

B -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE See: Heating and Air

Conditioning/Testing and Inspection/Symptom Related Diagnostic Procedures

A -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (SMOG VENTILATION SENSOR - BODY GROUND)

(a) Disconnect the smog ventilation sensor connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (SMOG VENTILATION SENSOR - BATTERY)

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 695

(b) Turn the engine switch on (IG).

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Text in Illustration

NG -- REPLACE FLOOR WIRE

OK -- Continue to next step.

7. CHECK FLOOR WIRE (SHORT TO GROUND)

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Measure the resistance according to the value(s) in the table below.

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 329

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Air Conditioner / Active Test.

(e) Check the operation by referring to the table below.

Air Conditioner

OK:

Air flow position changes in accordance with each control range.

NG -- INSPECT NO. 1 AIR MIX CONTROL SERVO MOTOR (AIR OUTLET CONTROL SERVO MOTOR)

OK -- REPLACE A/C AMPLIFIER

3. INSPECT NO. 1 AIR MIX CONTROL SERVO MOTOR (AIR OUTLET CONTROL SERVO MOTOR)

(a) Replace the No. 1 air mix control servo motor (air outlet control servo motor) See: Heating and Air Conditioning/Housing Assembly

HVAC/Service and Repair/Overhaul/Disassembly.

HINT

Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known

good one and check that the condition returns to normal.

(b) Check for the DTC.

Result:

B -- END (AIR OUTLET CONTROL SERVO MOTOR WAS DEFECTIVE)

A -- Continue to next step.

4. INSPECT AIR CONDITIONING HARNESS

(a) Replace the air conditioning harness See: Heating and Air Conditioning/Housing Assembly HVAC/Service and

Repair/Overhaul/Disassembly.

HINT

Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness

with a new or a known good one and check that the condition returns to normal.

(b) Check for the DTC.

Result:

B -- END (AIR CONDITIONING HARNESS WAS DEFECTIVE)

A -- REPLACE A/C AMPLIFIER

From 08/2009

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1443/43: Air Outlet Damper Control Servo Motor Circuit

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 276

(b) Turn the engine switch on (IG).

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Text in Illustration

NG -- CHECK NO. 2 FLOOR WIRE (SHORT TO B+)

OK -- Continue to next step.

6. CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT (SHORT TO GROUND)

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:

Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Measure the resistance according to the value(s) in the table below.

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 317

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Air Conditioner / Active Test.

(e) Check the operation by referring to the table below.

Air Conditioner

OK:

Recirculation damper position changes in accordance with each control range.

NG -- INSPECT AIR INLET CONTROL SERVO MOTOR

OK -- REPLACE A/C AMPLIFIER

3. INSPECT AIR INLET CONTROL SERVO MOTOR

(a) Replace the air inlet control servo motor See: Heating and Air Conditioning/Blower Motor/Service and

Repair/Overhaul/Disassembly.

HINT

Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known

good one and check that the condition returns to normal.

(b) Check for the DTC.

Result:

B -- END (AIR INLET CONTROL SERVO MOTOR WAS DEFECTIVE)

A -- Continue to next step.

4. INSPECT AIR CONDITIONING HARNESS

(a) Replace the air conditioning harness See: Heating and Air Conditioning/Housing Assembly HVAC/Service and

Repair/Overhaul/Disassembly.

HINT

Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness

with a new or a known good one and check that the condition returns to normal.

(b) Check for the DTC.

Result:

B -- END (AIR CONDITIONING HARNESS WAS DEFECTIVE)

A -- REPLACE A/C AMPLIFIER

From 08/2009

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1442/42: Air Inlet Damper Control Servo Motor Circuit

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) Page 391

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Air Conditioner / Active Test.

(e) Check the operation by referring to the table below.

Air Conditioner

OK:

Air temperature changes in accordance with each control range.

NG -- INSPECT NO. 1 AIR MIX CONTROL SERVO MOTOR (AIR MIX CONTROL SERVO MOTOR)

OK -- REPLACE A/C AMPLIFIER

3. INSPECT NO. 1 AIR MIX CONTROL SERVO MOTOR (AIR MIX CONTROL SERVO MOTOR)

(a) Replace the No. 1 air mix control servo motor (air mix control servo motor) See: Heating and Air Conditioning/Housing Assembly

HVAC/Service and Repair/Overhaul/Disassembly.

HINT

Since the servo motor cannot be inspected while it is removed from the vehicle, replace the servo motor with a new or a known

good one and check that the condition returns to normal.

(b) Check for the DTC.

Result:

B -- END (AIR MIX CONTROL SERVO MOTOR WAS DEFECTIVE)

A -- Continue to next step.

4. INSPECT AIR CONDITIONING HARNESS

(a) Replace the air conditioning harness See: Heating and Air Conditioning/Housing Assembly HVAC/Service and

Repair/Overhaul/Disassembly.

HINT

Since the air conditioning harness cannot be inspected while it is removed from the vehicle, replace the air conditioning harness

with a new or a known good one and check that the condition returns to normal.

(b) Check for the DTC.

Result:

B -- END (AIR CONDITIONING HARNESS WAS DEFECTIVE)

A -- REPLACE A/C AMPLIFIER

From 08/2009

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1446/46: Air Mix Damper Control Servo Motor Circuit (Driver